Armature.



No. 732,200. PATENTED JUNE 30, 1903.

J. A. LITTLE.

ARMATURB.

APPLICATION FILED SEPT. 20, 1902.

N0 MODEL.

UNITED STATESV Patented June 30, 1903.

PATENT OEEICE.

JOHN A. LITTLE, OF ST. LOUIS, MISSOURI, ASSIGNOR TO GLOBE ELECTRICCOMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

ARIVIATURE.

.SPECIFICATION forming part of Letters Patent No. 732,200, dated. June80, 1903.

Application filed September 20, 1902. Serial No. 124,159. (No model.)

To @ZZ whom. it may concern.'

Be it known that I, JOHN A. LITTLE, a citizen of the United States,residingat the city of St. Louis, State of Missouri, have invented acertain new and useful Improvementin Armatures, of which the followingis a full, clear, and exact description, such as will enable othersskilled in the art to which it appertains to make and use the same,reference Io being had to the accompanying drawings, forming part ofthis speciticatiomi'n which- Figure l is a vertical sectional view takenon line l 1 of Fig. 2 looking in the direction indicated by the arrow.Fig. 2 is a longitudinal sectional view. Fig. 3 is a fragmentary view ofone of the end me1nbers,illustrat ing the contour of its inner face; andFig. 4 is an end view of one ofthe armature-sections detached.

2o The object of this invention is to produce a built-up armature offragmentary parts which When united and connected will present aharmonious whole, bnt which will permit of cutting out one or more ofthe sections thereof in case of the destruction of its or theirefficiency without disabling the remaining members and which Vcuttingout will reduce the total efficiency only in proportion to the number ofsuch disabled sections.

3o To that end there are employed a pair Vof end members or heads l,provided With the hub portions 2, keyed to the shaft 3 by the keys Il.Said heads are provided on their innerfaces with the hollow hub portions5,upon which are the shoulders 5a, from the outer circumferential faceof which eXtenda series of radial channels or grooves 6, which channelsextend quite to the perimeter of said heads and have parallel sidewalls, thus'per- 4o mitting the cutting thereof with anordinarymilling-tool, while the intervening elevated portions comprise a seriesof radial wedges 7, with their wider portions at the circumference. Suchchannels 6 are cut of sufficient depth to readily accommodate thewindings of the core-sections when in position.

Between the heads l are a series of sections S, having a form incross-section to correspond to said Wedge-shaped elevations 7, and 5oprojecting laterally therefrom are the cores 8, upon which the windingsare placed.

WhenA the cores are properly wound, the requisite number of sections areplaced in position about the shaft 3 with their inner ends abuttingagainst said shoulders 5, with 55 the Wedge of each section contactingclosely with the lateral projecting face of the next section, as shownin Fig. l, in which position they are temporarily bound together by anyconvenient means, such. as a sufficient 6o number of bands of hoopiron,dac., after which a drill is inserted through the openings 9 and Y theends of said sections are tapped for the centering-screws l0, one foreach section, after which said centeringscrews are inserted to hold saidsections in position and the machine-screws 12 are inserted through theopenings 11 and the whole is firmly united together, after which thekeys 4. are inserted and connection made to 7o shaft 3.

In the event of one of the sections burning out or becoming disabledfrom any cause its coil is cut out, skipping the disabled section, andthe motor may continue its work with only slight decrease inefficiency.A

I am aware that minor changes in the construction, arrangement, andcombination of the several parts of my motor can be made andsubstituted. for those herein shown and 8o described without in theleast departing from the nature and principle of my invention.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

l. In an armature, a pair of separable supporting members, interveningpolar sections of substantially wedge shape in cross-section, andVshoulders for holding said sections in position between said supportingmembers; sub- 9o stantially as described.

2. In an armature, a series of removable polar sections arrangedcircumferentially, and shoulders for retaining them in position;substantially as described. 95

3. In an armature, a series of removable core-sections arrangedcircumferentially, and supporting members with shoulders thereon forretaining them in position; substantially as described.

4. In an armature, a series of armaturesections having integral polarprojections at an angle thereto, and retaining members with projectionsthereon for retaining them in p0- sition; substantially as described.

5. In an armature, a series of armaturesections having integral polarprojections at an angle thereto, head members with hubs thereon formingsupporting means therefor, and means for securing them against lateralshifting; substantially as described.

6. In an armature, head-pieces with radial channels therein, a series ofremovable polar sections arranged ci rcumferentially therebetween, andmeans forl uniting them to the head-pieces; substantially as described.

7. In an armature, a series of removable wedge-shaped pole-pieces, andlateral coresections projecting therefrom about midway their length andheads with projections thereon forming supports therefor; substantiallyas described.

8. ln an armature, a series of removable pole-pieces with lateralcore-sections integral therewith, and heads with inwardly-project inghubs to which heads said members are connected; substantially asdescribed.

9. In an armature, a pair of heads, radial channels in said heads, andinterposed sections whose windings occupyv said channels in part;substantially as described.

l0. In an armature, a pair of heads, shoulders on the opposing facesthereof, and polar piecesV resting on said shoulders and having lateralprojections; substantially as described.

1l. In an armature, a pair of heads, shoulders on the opposing facesthereof, channels in said faces, and polar pieces resting on saidshoulders and provided with windings which occupy said lchannels inpart; substantially as described.

l2. In an armature, a pair of heads, shoulders on the opposing facesthereof, radial channels extending frotn said shoulders to the'circumference thereof and removable polar pieces the windings of whichrestin said channels; substantially as described.

In testimony whereof I hereunto affix my signature, in the presence oftwo witnesses, this 17th dav of September, 1902.

JOHN A. LITTLE.

lVitnesses:

GEORGE BAKEWELL, G. A. PENNINGTON.

